Githyanki are an ancient line of militaristic humanlike beings who reside in the Astral Plane. Generations of combat training have made the githyanki agile and sturdy. However, their single-minded devotion to warfare has stolen much of their intuition and judgment. Githyanki are gaunt, averaging 6 feet 3 inches tall and typically weighing around 170 points. They possess rough, yellow skin and black hair that is often pulled into one or more topknots. Their eyes gleam darkly and their ears are pointed and serrated in back.

Renegade Githyanki are those Githyanki who are discontent with the githyanki doctrine or power structure, and want a different life for themselves.

[Source: Manual of the Planes by Jeff Grubb, Bruce R. Cordell, and David Noonan. Published by Wizards of the Coast. p.174-175. Also PS3E, Chapter 2, p.19-22]